Our offering of tweezers meets a multitude of applications in science, research and industry. Observe the high quality DUMONT® tweezers increased in styles and numbers.

Below is a list depicting metals and the codes used to distinguish them.

The representative tweezers’ groups are listed above for a fast link to the specific types.

The tweezer points measurements should be considered for your application. For example, the sharpest, smallest point (new in this catalog and on our web) is number 505-U, which is stainless steel with points of size 0.025 x 0.005mm. This is a special tweezer suited, for example, to pickup EM grids off of very smooth surfaces. Most applications will not require such a fine tweezer and your choices are manifold.

Dumont Dumostar tweezers are the hardest tweezer. They are non-magnetic with corrosion resistant steel (sea water, HCl, H3PO4, HNO3, H2SO4). They are resistant to neutral and alkaline environments. DUMOSTAR from DUMONT is superior to the best stainless steel. Tip hardness is progressive and reaches its peak in the zone of a style 5 tweezer with tip hardness in the Rockwell range of 63-64.

Even non-magnetic steel alloys can exhibit magnetism when exposed to strong magnetic fields. Only titanium or plastic tweezers are fully non-magnetic.

Abbreviations for the metals and materials:

Alloys and Materials

DS DUMOSTAR
An alloy blend of steel, chromium, nickel, and cobalt, elastic in nature for “flexible
fatigue resistant tips”, resists temperatures to 550°C, and is non-magnetic and
anti-corrosive. The best overall material for tweezers. Rockwell 63-64.

SS Stainless Steel
High tensile strength chromium/carbon steel alloy (various compositions) provides for good
corrosion and stain resistance, second in hardness only to DUMOSTAR Note: stainless
steel can rust under some circumstances.

NM Non-magnetic
A standard alloy composed of C, Cr, Ni and Mo. It offers a good resistance to corrosion thanks
to its high concentration of Mo and is 80% non-magnetic, but it is not as hard as NM-stainless
steel. NM is resistant up to temperatures of around 400°C (DIN 50 914) and is suitable for
autoclave sterilization at 270°C.